<?php

   header('Content-type:text/html;charset=utf-8');

   $year = input('get.year');
   echo $year;
  /* $year = 2020;
   $result=(($year%4==0) && ($year%100!=0) || ($year%400==0))?'是闰年':'不是闰年';
   echo '<h2>闰年的判断</h2>';
   echo '<p>输入的年份:'.$year;*/

/*
   $year = 2020;
   if (($year%4==0) && ($year%100!=0) || ($year%400==0)) {
       echo $year.'年是闰年';
   }else{
       echo $year.'年不是闰年';
   }



  /* $name = '小明';
   $score = 90;

   if (is_int($score)  || is_file($score)) {
       if ($score >=90 && $score <=100) {
           $str = 'A级';
       }elseif ($score >= 80 && $score < 90){
           $str = 'B级';
       }elseif ($score >= 70 && $score < 80){
           $str = 'C级';
       }elseif ($score >= 60 && $score < 70){
           $str = 'D级';
       }elseif ($score >= 0 && $score < 600) {
           $str = 'E级';
       } else {
           $str = '学生成绩范围必须在0-100！';
       }
       echo  $str;*/